I’ve got the transmission out and that had me thinking about my rear main. It has a slight leak in it and on my old tj I didn’t like the 2-piece design of the seal. Easy to replace in your garage, yes, but the design seemed prone to future failure. I don’t know, just thought I’d see if there was a better option. If not, next time I change the oil, I’ll just use the regular 2-piece seal. Thank you!